var createError = require('http-errors');
var express = require('express');
var path = require('path');
var fs = require('fs');
var cookieParser = require('cookie-parser');
var logger = require('morgan');
const session = require('express-session');
const RedisStore = require('connect-redis')(session)

var indexRouter = require('./routes/index');
var adminRouter = require('./routes/admin');
var usersRouter = require('./routes/users');
var loginRouter = require('./routes/login');
var registerRouter = require('./routes/register');
var apiRouter   = require('./routes/api');

var app = express();

// view engine setup
app.set('views', path.join(__dirname, 'views'));
app.set('view engine', 'ejs');

const ENV = process.env.NODE_ENV
if (ENV !== 'production') {
    // 开发环境 / 测试环境
    app.use(logger('dev'));
} else {
    // 线上环境
    const logFileName = path.join(__dirname, 'logs', 'access.log');
    const writeStream = fs.createWriteStream(logFileName, {
        flags: 'a'
    });
    app.use(logger('combined', {
        stream: writeStream
    }));
}
app.use(express.json());
app.use(express.urlencoded({extended: false}));
app.use(cookieParser());
app.use(express.static(path.join(__dirname, 'public')));

const redisClient = require('./db/redis');
const sessionStore = new RedisStore({
    client: redisClient
});
app.use(session({
    secret: 'WJiol#23123_',
    cookie: {
        // path: '/',   // 默认配置
        // httpOnly: true,  // 默认配置
        maxAge: 24 * 60 * 60 * 1000
    },
    store: sessionStore
}));

app.use('/', indexRouter);
app.use('/admin', adminRouter);
app.use('/users', usersRouter);
app.use('/login', loginRouter);
app.use('/register', registerRouter);
app.use('/api',apiRouter);

// catch 404 and forward to error handler
app.use(function (req, res, next) {
    next(createError(404));
});

// error handler
app.use(function (err, req, res, next) {
    // set locals, only providing error in development
    res.locals.message = err.message;
    res.locals.error = req.app.get('env') === 'dev' ? err : {};

    // render the error page
    res.status(err.status || 500);
    res.render('error');
});

module.exports = app;
